Pressure actuated tubing safety valve

Details Pressure actuated tubing safety valve Pressure actuated tubing safety valve

2007-07-24

2007-07-24

Gay, Jennifer H. (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S332800

Reexamination Certificate

active

10957240

ABSTRACT:
The present invention generally provides a downhole valve for selectively sealing a bore. The downhole valve generally includes a closing member for seating in and closing the bore, and a pressure-actuated, retention member having first and second opposed piston surfaces for initially holding the valve in an open position but, in the event of a pressure differential between the piston surfaces, permits the closing member to operate and close the valve.

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U.K. Search Report, Application No. GB0520091.0, dated Nov. 14, 2005.

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